There is a long list of new features
which you can read about in the introduction
document. One of the most visible
new features is the four columns welcome text area on the home page:

More
documentation about the XPages
Documentation Wiki is located in an instance of this Wiki template.

Jennifer describes briefly the new documentation
wiki and it's relation to the core XPages Wiki:

<< The XPages Documentation Wiki
was created for the community to contribute articles and for a writing
team to publish documentation. The XPages Documentation Wiki is based on
the XPages Wiki template available on OpenNTF and it has been expanded
to add more features, many of which to support publishing documentation.
The future of these two templates is being discussed but for now both templates
will be available on OpenNTF. >>